Synchronized speed-regulated power-transmission apparatus



' July 7, 1925. 1,544,646

M. J. JOHNSON ET `AL SYNCHHONIZED SPEED REGULATED POWEE TRANSMISSION APPARATUS Filed Nov l, 1922 other is under Patented July 7, 1925.

4UNITED STATES MANFRED J. JOHNSON,

l AssmNons interieur,v A ooRroRATIoN SYNCHRONTZED sPEmnEGULATED- I Application led November To au whom t may com-em.'

Be it known that we, MANFRED J. JoHN- soNand THoMAs E. Wm'rn, citizens of the -United States, and residents of Naugatuck and Waterbury', respectively, in the county of New Haven and vState of Connecticut,` have invented certain new and useful Improvements in ulated Power-Transmission A which the following is a speci cation.

The invention relates to 'a power transf mission apparatus which is designed to operate at various speeds, the particular rotational velocity of the transmitted power being under the control of, and corresponding to and synchronized with the speed of, a secondary and minor power or control member. The apparatus set forth ma be employed for various purposes; and, or example, is particularly suitable in connection with the operation of synchronized devices, such as a mot-ion picture projector and sound reproducing apparatus operating synchronously therewith and wherein it is desired to provide ampley power for operating one of the members, for example the projector, and yet y allow of control of the rotationalvelooity thereof from and in accordance with the velocity of a member of much less power,- such as the sound reproducing apparatus.

In acordance with the present invention, when the devices are not operatin there is no positive connection 4between t e power member andthe operating'driven shaft or apparatus to be power-operated, the connection between' the source of power and the operating driven shaft being dependent paratus, of

upon movement of the control member and I the rotational velocity entirely upon the rotational velocity of said control member and is initiated thereby. The rotational velocity of said operating shaft will be directly proportional, also, to the said rotational velocity of the control member and will conform thereto so thatthe several members may be arranged to be maintained in synchronous operation and one at least provided with considerable power. Y

To this end, a frictiondisk drive is employed to effect the transmission of power to the member requiring the greater power and the movement of one of the disks over the the control of the said control member loperating at lesser power. More- OF NAUGATUCK, AND THHAS E.

Synchronized Speed-Reg- M provide for wear,

nection with the 'regulation of t v WHITE, 0F WATERBURY,

T0 THE BRISTOL COMPAITZ- 0F WATERBUB`Y, GON- OF CONNECTICUT.

POWER-TRANSMISSION APPARATUS.

1, 1922. Serial No. 598,426.

s uch that, when the apparatus is in operation, an axial thrust results which automatically exerts a positive pressure between the disks suilicient to insure the transmission of the power therethru, Vthe pressure being 1n proportion to the power transmitted. eans, also, are provided for adjusting the initial friction between the disks, and to as by affording manual adjusting the shaft on which'onel of sai disks is mounted.

The nature of the invention, however, will best be understood when described in conmeans for axial? in which- Fig. l is a paratus. v Fig. 2 is a vertical section, taken on the line 2 2, Fig. l, and looking in the direction of the arrows.

Similar characters of plan of the transmission apreference designate corresponding parts thruout the several views.

Referring to the drawings, 10 designates a control motor, such as a synchronized motor employed in connection wlth the synchronous operation of a motionr picture projector and talking machine -(not shown), said control motor being o erated from and under thev e latter, all of which is more fu y set forth in U. S. Letters Patent Nos. 1,234,127 and 1,396,401. f j

As set forth in said patents, the projecting machine (not shown) is to be driven from a driving shaft as the shaft 11 andv to which suitable power is to be transmitted. n accordance with the present invention, this is effected, by the particular interl l mediate mechanism forming the subjectmatter of the present invention, from a driving motor 12. Control motor 10 is caused to rotate a shaft 13, and the driving motor 12 a shaft 14 arranged parallel to the shaft 13 and normally disconnected from the shaft 1l. A compensating and threaded shaft l5 is arranged between and arallel therewith, and the said threaded sh-afl.) is connected with the control shaft thru suitable gearing 16 including a nut member- 16 fttin over the threads of the compensating sha t 15. Mounted over one end of the nut member is a ring 17 which is pivotally held at the top and bottompto l accompanying drawings, i

yokel- S' lembracing designed to be engaged by the ing the compensating shaft and at v one end of a lever 19. The other end of the lever 19 is provided with a similar yoke 20 embracing the shaft 14 and .pivotally mounted to the top and bottom of a ring member 21 loosely mounted on the power shaft 14. l Thereis, further mounted on the power shaft, and slidable Vlongitudinally along same with ring 21, one member 25 of a friction disk drive, said member being reciprocable on said power shaft thru the action of the ring-21. A v

Arrangeda-t right' angles to the power shaft'14 is the cooperating friction disk 26,

driving member- 25 v(as indicated in the'position shown in dotted lines); and the same is mounted on -a driven shaft 27 which islocated in a plane at right angles to the shafts 13, 14 and mem face of the disk 26, the velocity of rotation of the latter will be correspondingly varied. In order to regulate the initial degree of l friction between the two members 25 and 26 .l screw 29, the adjusted position being fixed of the friction drive, as well as to take up any wear of same, the' shaft 27 may be mounted for axial movement to a slight degree in its bearings 28, as thru an adjustable i ,by a suitable lock nut 30 andthe extent of the outward movement being limited by a collar 31 on the shaft. The shaft 27, furthermore,

substantially at its end, carries a worm 32 engaging a worm wheel 33 on the driving shaft 11; and the drive is in such a ydirection Athat the transmission of power from the shaft 27 to the driving shaft 11 will produce an axial thrust by the gearing. in the direction of the friction disk members to insure the transmission of power therethru and proportionally to the power transmitted.

There is further provided on the shaft 27 engagement with a worm wheel 36 of the threaded compensating shaft 15 sothat, when the shaft 27 is rotating, the

. movement of nut 16 said shaft 15, will be compensated for.

on the shaft 15, due to imparted to the The said nut is caused thereby to reciprocate on said shaft 15 in directv relation tothe rotational .velocities of the said shafts 13 and the correspondingv rotation 27 and accordingly controls the transmitted rotational velocity by the corresponding radial movement of member 25 'with respect to the member 26. The 'driving shaft ,11 is thereby also maintained at a speed which is in accordance- -with and directly proportional to the rotation ofv the said control shaft.

"1. In apparatus of the character set forth a control motor and a shaft rotatable therevffect engagement .15. lIt will be understood that, as the drivr 25 is moved radially over the.'YI

"shaft, connecting by, adriving motor and power shaft driven thereby, a driven shaft normally out o'f engagement with the power shaft, means to transmit power from the said power shaft to the said driven shaft, andmeans controlling the said power transmission means op-A erated by the said control shaft and the 1 of the character set a driven shaft disconnected-- power may be transmitted from the .former l to the latter,y and means operating in connection with the saidv control power shaft and the said drivenfshafttofefof the friction, members the rotation'j-.offthe driven for regulatin ance with the--rotationfof the lshaft in accor control shaft.

3. In apparatus of thecharacterisetfforth:

' a control motor and control'shaft rotatable motor and .power shaft driven thereby and located parallel tothe thereby, a driving control shaft, a drivenshaft locatedatright angles to the saidsh normally from said power shaft, a friction drive member on the'powershaft and a friction drive disk on the driven shaftfwhereby power mav be transmitted fromthe former to the latter, and

power,- shaft and means operating in connection with the vsaid control shaft, the said. the said driven shaft to' shaft,- the said,`

fts and disconnected eifectengagement of thefriction members for` regulating the rotation ofthe driven shaft in accordance with the rotation of the control shaft. Y

4. In apparatus of the character set forth: a control motor and control shaft rotatable thereby, Va threaded compensating shaft, ,connecting m'eans including a nut working on said compensating shaft, a driving motor and a power shaft driven thereby, a friction member slidablethereon, a ring mounted on said power shaft to move the friction member, at each end, the yoke of one end being pivotally connected with the nut onthe'- said compensating shaft land the yoke at the other lend vbeing pivotally connectedA with the ring mounted on the power shaft, a driven shaft,"a friction disk thereon adapted to engage with the friction member power shaft, and a worm on said driven shaft and a worm gear in engagement therew'litl and mounted on the compensating s a 5. In apparatus of the character set forth: a control motor and control shaft roa threaded compensatingk tatable thereby,

means including a nut working on said compensatlng shaft, a.k drivof the ring mg motor and a power shaft driven thereby, a friction' member slidablel thereon, a mounted on said power shaft to move the frictionl member, a-lever having a yoke at each end, the yoke of one end being pivotally connected compensating shaft and the yoke at the other end being pivotally connected with the ring mounted on the power shaft, a driven shaft, a friction disk thereon4 adapted to engage with thel friction. power shaft, a worm on said driven shaft and a worm gear in engagement therewith and mounted on the compensating. shaft, and means to effect an axial thrust in the direction of the friction member of the power shaft.

shaft, connecting 6. In apparatus of the character set .and control shaft roa threaded compensating means includinga n'ut working on said compensating shaft, a driving motor and a power shaft drivenA thereby, a friction member slidable thereon, a ring mounted on said power shaft to move the friction member, a lever "having a yoke at each end, theyoke of` one end being pivotally connected with the nut on the said tatable thereby,

compensating shaft and the yoke at the other end being pivotally. connected with the ring mounted on the power shaft to effect movement of its s'aid friction member `along the power shaft, a'driven shaft, a friction diskthereon adapted to engage with the friction member of the powerl shaft, a

,having a worm wheel with the nut on the .said

member ofthe worml on said driven shaft and a worm gear in engagement therewith and mounted on'the compensating shaft, a second worm on said driven shaft, and an operating shaft in engagement with the said second worm, theV engagement of said second worm and its worm wheel being such'as to veffect an axial thrust in the direction of the friction member of the power shaft.

7. In apparatus of the character set forth: a control motor and control shaft rotatable thereby, a driving motor and poweil shaft driven thereby, a driven shaft disconnected normally from said power shaft,

a friction drive member and a friction drive disk on the driven shaft whereby' power may be transmitted from the former to the latter, means operated by the said control shaft and the said power shaft and the said -driven shaft to effect engagement of the friction members for regulating the rotation of the driving shaft in accordance with the rotation'of the control shaft,y and means to axially adjust the on the power shaft,

drivenl shaft to automatically regulate the degree of friction between the said friction members in proportion to thepower transmitted from the power shaft tothe driven shaft.

Signed atl Waterbury, in the county ofv lNew Haven and State of Connecticut this 

